#ifndef BASESOLVER_H_
#define BASESOLVER_H_

#include "include.h"
#include "fluidconstants.h"
#include "externalmedialib.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct FluidConstants;

//! Base solver class.
/*!
  This is the base class for all external solver objects
  (e.g. TestSolver, FluidPropSolver). A solver object
  encapsulates the interface to external fluid property
  computation routines

  Francesco Casella, Christoph Richter, Roberto Bonifetto
  2006-2012
  Copyright Politecnico di Milano, TU Braunschweig, Politecnico
  di Torino
*/
class BaseSolver{
public:
	BaseSolver(const string &mediumName, const string &libraryName, const string &substanceName);
	virtual ~BaseSolver();

	double molarMass() const;
	double criticalTemperature() const;
	double criticalPressure() const;
	double criticalMolarVolume() const;
	double criticalDensity() const;
	double criticalEnthalpy() const;
	double criticalEntropy() const;

	virtual void setFluidConstants();

	virtual void setState_ph(double &p, double &h, int &phase, ExternalThermodynamicState *const properties);
	virtual void setState_pT(double &p, double &T, ExternalThermodynamicState *const properties);
	virtual void setState_dT(double &d, double &T, int &phase, ExternalThermodynamicState *const properties);
	virtual void setState_ps(double &p, double &s, int &phase, ExternalThermodynamicState *const properties);
	virtual void setState_hs(double &h, double &s, int &phase, ExternalThermodynamicState *const properties);

	virtual double partialDeriv_state(const string &of, const string &wrt, const string &cst, ExternalThermodynamicState *const properties);

	virtual double Pr(ExternalThermodynamicState *const properties);
	virtual double T(ExternalThermodynamicState *const properties);
	virtual double a(ExternalThermodynamicState *const properties);
	virtual double beta(ExternalThermodynamicState *const properties);
	virtual double cp(ExternalThermodynamicState *const properties);
	virtual double cv(ExternalThermodynamicState *const properties);
	virtual double d(ExternalThermodynamicState *const properties);
	virtual double ddhp(ExternalThermodynamicState *const properties);
	virtual double ddph(ExternalThermodynamicState *const properties);
	virtual double eta(ExternalThermodynamicState *const properties);
	virtual double h(ExternalThermodynamicState *const properties);
	virtual double kappa(ExternalThermodynamicState *const properties);
	virtual double lambda(ExternalThermodynamicState *const properties);
	virtual double p(ExternalThermodynamicState *const properties);
	virtual int phase(ExternalThermodynamicState *const properties);
	virtual double s(ExternalThermodynamicState *const properties);
	virtual double d_der(ExternalThermodynamicState *const properties);
	virtual double isentropicEnthalpy(double &p, ExternalThermodynamicState *const properties);

	virtual void setSat_p(double &p, ExternalSaturationProperties *const properties);
	virtual void setSat_T(double &T, ExternalSaturationProperties *const properties);

	virtual void setBubbleState(ExternalSaturationProperties *const properties, int phase,
		                    ExternalThermodynamicState *const bubbleProperties);
   	virtual void setDewState(ExternalSaturationProperties *const properties, int phase,
	                         ExternalThermodynamicState *const bubbleProperties);

	virtual double dTp(ExternalSaturationProperties *const properties);
	virtual double ddldp(ExternalSaturationProperties *const properties);
	virtual double ddvdp(ExternalSaturationProperties *const properties);
	virtual double dhldp(ExternalSaturationProperties *const properties);
	virtual double dhvdp(ExternalSaturationProperties *const properties);
	virtual double dl(ExternalSaturationProperties *const properties);
	virtual double dv(ExternalSaturationProperties *const properties);
	virtual double hl(ExternalSaturationProperties *const properties);
	virtual double hv(ExternalSaturationProperties *const properties);
	virtual double sigma(ExternalSaturationProperties *const properties);
	virtual double sl(ExternalSaturationProperties *const properties);
	virtual double sv(ExternalSaturationProperties *const properties);

	virtual bool computeDerivatives(ExternalThermodynamicState *const properties);

	virtual double psat(ExternalSaturationProperties *const properties);
	virtual double Tsat(ExternalSaturationProperties *const properties);

	//! Medium name
	string mediumName;
	//! Library name
	string libraryName;
	//! Substance name
	string substanceName;

protected:
	//! Fluid constants
	FluidConstants _fluidConstants;
};

#endif // BASESOLVER_H_
